"""
    二维向量，可以表示位置/方向
"""

list_of = [
    ['00','01','02','03','04'],
    ['10','11','12','13','14'],
    ['20','21','22','23','24']
]

class Vector2:
    def __init__(self, x, y):
      self.x = x
      self.y = y

# 向左,表示左边方向，x不变，y变
def left():
    return Vector2(0, -1)
# 向右,表示右边方向
def rigft():
    return Vector2(0, 1)

pos1 = Vector2(1,2)
l01 = rigft()
pos1.x += l01.x
pos1.y += l01.y
print(pos1.x, pos1.y)